Today I built up my Pedal Force ZX3. When it came time to preload the headset and set the stem I ran into some trouble. I'm using a FSA Orbit IS headset that I got from Pedal Force.

The problem is that I can't tighten down the top cap enough to take out all of the play without it becoming very hard (in relation to normal) to move the handlebars side to side. It seems to me that the upper cover is touching to top of the headtube and causing friction.

How do I solve this?